Windows Vista Ultimate is my host and CentOS 5.3 is my guest OS and I'm using the latest version of VirtualBox. My Windows public IP address is xx.xxx.xx.xxx. Since CentOS has the same IP address as my Windows Vista host, I'd like to know if there's a way to give the CentOS guest it's own IP address.

MOD Edit: I have edited your post and removed the IP address. No need to give your public address as it has nothing to do with what you need and you really don't want everyone having it.

That is as it should be. It is picking up the IP that your provider is giving you. Remember that everything is virtual. If you can communicate with your machines and you are able to get to the internet then it is working as it should.

Perryg wrote:That is as it should be. It is picking up the IP that your provider is giving you. Remember that everything is virtual. If you can communicate with your machines and you are able to get to the internet then it is working as it should.

I am able to get onto the internet on the guest OS. But the guest OS is using the same IP address as the host OS. Is there a way where I can change the guest IP address?

If you have setup VBox to use Bridged and there are no other network adapter settings to other protocols it can not be using the same IP address. Neither of the PC's that use that IP address would work. Only thing that would cause that is if you had Host only mode setup as well. Shut down you guest and look at the settings under network and make sure that you only have (1) adapter set and that it is set to bridged.